linux-kernel - Re: [PATCH 21/54] kernel: replace cpumask_weight with cpumask

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YfONNmDkwcKK+Ik2@gondor.apana.org.au>
Date:   Fri, 28 Jan 2022 17:29:10 +1100
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Yury Norov <yury.norov@...il.com>
Cc:     yury.norov@...il.com, andriy.shevchenko@...ux.intel.com,
        linux@...musvillemoes.dk, akpm@...ux-foundation.org,
        mirq-linux@...e.qmqm.pl, gregkh@...uxfoundation.org,
        peterz@...radead.org, David.Laight@...lab.com, joe@...ches.com,
        dennis@...nel.org, kernel@...il.dk, npiggin@...il.com,
        matti.vaittinen@...rohmeurope.com, aklimov@...hat.com,
        linux-kernel@...r.kernel.org, steffen.klassert@...unet.com,
        daniel.m.jordan@...cle.com, linux-crypto@...r.kernel.org
Subject: Re: [PATCH 21/54] kernel: replace cpumask_weight with cpumask_empty
 in padata.c

Yury Norov <yury.norov@...il.com> wrote:
> padata_do_parallel() calls cpumask_weight() to check if any bit of a
> given cpumask is set. We can do it more efficiently with cpumask_empty()
> because cpumask_empty() stops traversing the cpumask as soon as it finds
> first set bit, while cpumask_weight() counts all bits unconditionally.
> 
> Signed-off-by: Yury Norov <yury.norov@...il.com>
> ---
> kernel/padata.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt